Masalah Jaringan Sejak Terpercaya?

Sejak memutakhirkan (instalasi baru) ke Trusty (Kubuntu – EDIT dan sekarang Ubuntu vanilla, saya beralih kembali untuk memecahkan masalah ini lebih lanjut ) Saya telah melihat masalah jaringan.

Tepat setiap dua menit jaringan saya mati sesaat tetapi kemudian segera kembali online. Ini jelas tercermin dalam syslog:

Apr 24 07:52:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 07:52:51 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 07:54:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 07:54:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 07:56:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 07:56:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 07:58:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 07:58:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:00:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:00:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:02:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:04:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:04:51 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:06:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:06:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:08:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:08:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:10:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:10:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:12:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:12:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:14:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:14:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:16:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:16:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:18:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:18:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:20:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:20:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33

Saya belum menghabiskan terlalu banyak waktu untuk memecahkan masalah, saya baru saja menginstal sehari yang lalu. Saya ingin tahu apakah ada yang pernah melihat masalah ini sebelumnya? Saya tidak ingat melihat ini kembali ketika saya menggunakan Ubuntu 13.10 dengan perangkat keras yang sama persis hanya 3 hari yang lalu.

Perangkat keras:Tecra R840-S8430
Pengontrol jaringan:Intel Corporation Centrino Advanced-N 6230 [Rainbow Peak] (rev 34)
Rasa:Kubuntu + Ubuntu
Rilis:14.04 LTS

Pembaruan – Informasi lebih lanjut (5/05/05)

Ya, ini tampaknya memutuskan koneksi saya. Berikut adalah beberapa syslog dari drop biasa, saya harus menonaktifkan/mengaktifkan kembali wifi untuk mendapatkannya kembali:

May  5 09:29:57 Oban kernel: [74616.819616] wlan0: deauthenticated from 00:26:62:4f:c3:f6 (Reason: 6)
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: CTRL-EVENT-DISCONNECTED bssid=00:26:62:4f:c3:f6 reason=6
May  5 09:29:57 Oban NetworkManager[1151]: <warn> Connection disconnected (reason 6)
May  5 09:29:57 Oban kernel: [74616.851674] cfg80211: Calling CRDA to update world regulatory domain
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: SME: Trying to authenticate with 00:26:62:4f:c3:f6 (SSID='Air' freq=2462 MHz)
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: completed -> disconnected
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: CTRL-EVENT-SCAN-STARTED 
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: disconnected -> authenticating
May  5 09:29:57 Oban kernel: [74616.921570] wlan0: authenticate with 00:26:62:4f:c3:f6
May  5 09:29:57 Oban kernel: [74616.925036] wlan0: send auth to 00:26:62:4f:c3:f6 (try 1/3)
May  5 09:29:57 Oban kernel: [74616.931650] cfg80211: World regulatory domain updated:
May  5 09:29:57 Oban kernel: [74616.931654] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May  5 09:29:57 Oban kernel: [74616.931656] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74616.931658] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74616.931659] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74616.931661] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74616.931662] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74617.031487] wlan0: send auth to 00:26:62:4f:c3:f6 (try 2/3)
May  5 09:29:57 Oban kernel: [74617.035474] wlan0: authenticated
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: Trying to associate with 00:26:62:4f:c3:f6 (SSID='Air' freq=2462 MHz)
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: authenticating -> associating
May  5 09:29:57 Oban kernel: [74617.039506] wlan0: associate with 00:26:62:4f:c3:f6 (try 1/3)
May  5 09:29:57 Oban kernel: [74617.043029] wlan0: RX AssocResp from 00:26:62:4f:c3:f6 (capab=0x431 status=0 aid=4)
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: Associated with 00:26:62:4f:c3:f6
May  5 09:29:57 Oban kernel: [74617.050233] wlan0: associated
May  5 09:29:57 Oban kernel: [74617.050393] cfg80211: Calling CRDA for country: US
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: associating -> associated
May  5 09:29:57 Oban kernel: [74617.056664] cfg80211: Regulatory domain changed to country: US
May  5 09:29:57 Oban kernel: [74617.056673] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May  5 09:29:57 Oban kernel: [74617.056679] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
May  5 09:29:57 Oban kernel: [74617.056685] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
May  5 09:29:57 Oban kernel: [74617.056690] cfg80211:   (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74617.056695] cfg80211:   (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74617.056700] cfg80211:   (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74617.056705] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
May  5 09:29:57 Oban kernel: [74617.056711] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 4000 mBm)
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: associated -> 4-way handshake
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: WPA: Key negotiation completed with 00:26:62:4f:c3:f6 [PTK=CCMP GTK=CCMP]
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: CTRL-EVENT-CONNECTED - Connection to 00:26:62:4f:c3:f6 completed [id=0 id_str=]
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: 4-way handshake -> completed
May  5 09:31:34 Oban kernel: [74713.775114] wlan0: deauthenticated from 00:26:62:4f:c3:f6 (Reason: 6)
May  5 09:31:34 Oban wpa_supplicant[1368]: wlan0: CTRL-EVENT-DISCONNECTED bssid=00:26:62:4f:c3:f6 reason=6
May  5 09:31:34 Oban NetworkManager[1151]: <warn> Connection disconnected (reason 6)
May  5 09:31:34 Oban kernel: [74713.812782] cfg80211: Calling CRDA to update world regulatory domain
May  5 09:31:34 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: completed -> disconnected
May  5 09:31:34 Oban kernel: [74713.816717] cfg80211: World regulatory domain updated:
May  5 09:31:34 Oban kernel: [74713.816724] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May  5 09:31:34 Oban kernel: [74713.816729] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban kernel: [74713.816732] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban kernel: [74713.816735] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban kernel: [74713.816738] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban kernel: [74713.816741] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: disconnected -> scanning
May  5 09:31:49 Oban NetworkManager[1151]: <warn> (wlan0): link timed out.
May  5 09:31:49 Oban NetworkManager[1151]: <info> (wlan0): device state change: activated -> failed (reason 'SSID not found') [100 120 53]
May  5 09:31:49 Oban NetworkManager[1151]: <info> NetworkManager state is now DISCONNECTED
May  5 09:31:49 Oban NetworkManager[1151]: <warn> Activation (wlan0) failed for connection 'Air'
May  5 09:31:49 Oban dbus[943]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
May  5 09:31:49 Oban NetworkManager[1151]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
May  5 09:31:49 Oban NetworkManager[1151]: <info> (wlan0): deactivating device (reason 'none') [0]
May  5 09:11:56 Oban whoopsie[1374]: online
May  5 09:31:49 Oban whoopsie[1374]: offline
May  5 09:31:49 Oban kernel: [74729.721867] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
May  5 09:31:49 Oban NetworkManager[1151]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 11587
May  5 09:31:49 Oban avahi-daemon[1099]: Withdrawing address record for fe80::8a53:2eff:fe07:49c8 on wlan0.
May  5 09:31:49 Oban avahi-daemon[1099]: Leaving mDNS multicast group on interface wlan0.IPv6 with address fe80::8a53:2eff:fe07:49c8.
May  5 09:31:49 Oban avahi-daemon[1099]: Interface wlan0.IPv6 no longer relevant for mDNS.
May  5 09:31:49 Oban NetworkManager[1151]: <warn> DNS: plugin dnsmasq update failed
May  5 09:31:49 Oban NetworkManager[1151]: <info> Removing DNS information from /sbin/resolvconf
May  5 09:31:49 Oban avahi-daemon[1099]: Withdrawing address record for 192.168.1.5 on wlan0.
May  5 09:31:49 Oban avahi-daemon[1099]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.5.
May  5 09:31:49 Oban avahi-daemon[1099]: Interface wlan0.IPv4 no longer relevant for mDNS.
May  5 09:31:49 Oban dnsmasq[1888]: setting upstream servers from DBus
May  5 09:31:50 Oban NetworkManager[1151]: <warn> Couldn't disconnect supplicant interface: This interface is not connected.
May  5 09:31:50 Oban dbus[943]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'

Ini sangat membuat frustrasi. Saya tidak bisa selalu menggunakan cat5. Seperti yang saya katakan sebelumnya, ini tidak pernah terjadi pada 13.10. Saya benar-benar tidak ingin menurunkan versi. Apakah ada cara agar saya dapat menggunakan driver wifi dari 13.10?

Terkait:Masalah Bluetooth di 18,04 LTS?

Juga, saya mengubah keamanan wifi saya dari WPA2 ke 128 WEP dan sejauh ini saya hanya terputus sekali dalam beberapa jam. Di WPA2 rata-rata setiap 10.

Jawaban Terbaik

Menurut komentar di launchpad, itu tidak berbahaya:

WinEunuchs2Unix (ricklee518) menulis pada 18-08-2014:#24

Ups, ini telah berlangsung sejak 2009 dan pengembang menjawab bahwa ini hanya untuk roaming di lingkungan perusahaan dengan beberapa titik akses untuk terhubung. Jika Anda hanya memiliki satu AP di rumah masuk ke network manager, pilih "Edit Connection", sorot AP / wlan0 Anda dan klik "Edit". Kemudian klik panah bawah di sebelah BSSID yang kosong. Kemudian pilih alamat mac yang disembunyikan sebelumnya.

Saya minta maaf karena menautkan ini ke masalah 802.11n. Sekali digigit dua kali malu kurasa….

Saya telah melakukan langkah-langkah itu dan garis pemindaian dan kesalahan telah berhenti dicatat. Saya belum bisa memastikan apakah itu membuat koneksi saya lebih stabil, tetapi saya akan mencoba mengingat untuk memperbarui jawaban ini dalam satu atau dua hari.

Terkait:Mengonfigurasi Ubuntu 12.04 sehingga mengenali kompiler icc yang baru diinstal?

Saya kembali 3 minggu kemudian (telah kehilangan tab terbuka, oops), dan saya pikir itu membantu. Saya masih mendapatkan koneksi aneh yang terputus, tetapi sepertinya tidak sesering yang saya ingat ketika saya pertama kali menemukan pertanyaan ini.